Serge Godin remembers the event that gave him the drive and determination to succeed in life - watching his father's sawmill burn down.

He was 17 in Canada at the time, the year was 1966, and as his dad's business was uninsured, the family lost everything.

One of nine children brought up in rural Quebec, Mr Godin, along with his siblings, suddenly had to earn money to help his parents pay the bills and keep a roof over the family's heads.

So Mr Godin worked at a supermarket in the evenings after school, and then at a dry cleaner's on Saturdays.

Ambitious to run his own company, in his 20s he used savings of C$5,000 ($3,800; £3,100) to start a computer business that he called Conseillers en Gestion et Informatique (CGI). In English, this translates as Information Systems and Management Consultants.

Today CGI Group is a global IT systems giant that enjoys annual revenues of C$10bn, while Mr Godin's personal fortune is estimated at $1.5bn.

Now 67 years old and the firm's chairman, he says: "I didn't want to go back to the situation when we lost everything. That's probably what prompted me to build CGI."

Doubled in size

After gaining a computer science degree from Laval University in Quebec City, and a few years working for two companies, Mr Godin launched CGI in 1976, when he was 26.

In typical computer industry start-up fashion, he began the business from his garage. After a few months on his own, a friend joined the business, and in its first year, CGI generated revenues of C$138,000.

Image copyrightSerge GodinImage caption
Mr Godin is little known outside of Canada, but often features in Canadian papers

From that modest start, CGI has grown steadily ever since, fuelled by no fewer than 81 acquisitions, as Mr Godin has continued to follow a policy of ambitious growth.

In the company's most recent large takeover, it bought its European rival Logica for C$2.7bn in 2012. This more than doubled CGI's workforce, which rose overnight from 31,000 to 68,000.

Today its business clients include companies such as miner Rio Tinto, tyre-maker Michelin, airline group Air France-KLM and London's Heathrow Airport. CGI also does work for 22 of the world's largest banks, and has no fewer than 2,000 government contracts around the world.

Mr Godin, who reduced his daily workload in 2006 when he switched from chief executive to chairman, says the business has not given up on fast growth.

"We think we can double the size of the company [again] within five to 10 years," he says.

It hasn't all been plain sailing for Montreal-based CGI in recent years, however.

Back in 2013, it made headlines for all the wrong reasons, when it was blamed for technical problems that plagued the launch of the US government website where people on low or no income could apply for the new "Obamacare" health insurance.

Image copyrightCGIImage caption
CGI has a glitzy headquarters in Montreal

CGI had a central role in building the website, but Mr Godin said at the time that the company "ended up in the eye of a storm" between the two main US political parties.

Looking back, he says: "We stayed and finished the work.

"We were portrayed by the press as being the system integrator, but we were not. We were one of 52 companies involved in the project.

"We didn't fight this in the press, because we have a code of ethics and we never criticise our clients."

While the issue could not have been pleasant at the time, Mr Godin and CGI have always insisted that there was no long-term reputational damage.

People-centred dream

In terms of how CGI is run on a day-to-day basis, Mr Godin says he views it as a big family and that he has to keep everyone happy.

"At CGI we have a dream, and this dream is centred on the core of our business - our people," he says.

Image copyrightSerge GodinImage caption
The company floated on the Montreal Stock Exchange in 1986

"They are the ones who take the elevator to come to work every day, and we have to make sure they will come back and will like working here.

"As employers, we have rights, but we also have duties towards our employees."

One way in which CGI tries to look after its staff is encouraging them to become shareholders. And for every share that an employee buys, the company will buy him or her the same amount.

Mr Godin says: "This idea of sharing is important to me, because I come from a big family."

Robert Young, technology analyst at research group Canaccord Genuity, says: "Serge Godin is well regarded as the builder of a company with a strong culture and customer relationships.

"There is a discipline he has baked into the business that is evident in the strong financial controls, and rigorous approach to [what is known as] the 'CGI management foundation' - a set of proven processes and methods that define CGI engagements."

'Duty to give back'

When not continuing to help lead CGI, Mr Godin focuses on his charity work.

In 2000, he set up a charitable foundation called Jeunesse-Vie or Youth Life, which aims to help disadvantaged children across Canada through alleviating poverty and improving their education and health. So far, he has given it more than C$60m.

Having already been inducted into the Canadian Business Hall of Fame, last year he was also recognised for his business and charity work when he was made an Officer of the Order of Canada, one of the country's highest civilian honours.

Mr Godin says: "When you have the chance to have a successful business, it is your duty to give back."